Marnick Vermijl has joined Owls.

Romanian forward Bus, Vermijl and Melo penned three-and-a-half-year deals while McGugan, who spent just over a month on loan at Wednesday before the turn of the year, will stay until the end of the season.

Owls head coach Stuart Gray also allowed striker Caolan Lavery to join Chesterfield on a temporary basis until March 7 and let Mani Dieseruvwe complete a permanent switch to the League One club.

The Star understands Wednesday have paid in the region of £375,000 for Bus’s services. There are add-ons as part of the deal, which is subject to international clearance.

Bus, aged 22, has been tipped for full international honours with Romania. He has impressed in the Bulgarian top flight, hitting 10 goals in 19 matches.

Vermijl bolsters Wednesday’s defensive options. The Belgian player can play anywhere across the back four. With skipper Glenn Loovens ruled out of the next two matches due to suspension, Vermijl could be plunged straight into the action against Cardiff City on Saturday.

He said striker Will Keane, who recently joined Wednesday on loan from Old Trafford, played a big part in his decision to move to South Yorkshire.

Vermijl said: “Will is my friend and he told me nothing but good things about Sheffield Wednesday.

“He told me about how he has enjoyed it here and the size of the club. It made my decision easier because I am at a very important stage of my career. I know this is the right move for me .”

Nottingham-born McGugan is no stranger to Wednesdayites, having played seven times for the club earlier this season. He will bring some much-needed flair and creativity to the Owls’ midfield.

Melo, who began his career with Uniao Lamas, has played for Moreirense since 2013, skippering the club to the Portugese top tier last season. Like the Bus transfer, Melo’s switch is subject to international clearance.